Models of strong interaction in flat-band graphene nanoribbons: Magnetic quantum crystals

Article

关键词: WANNIER FUNCTIONS;    POINT-DEFECTS;    FERROMAGNETISM;    EDGE;    STATE;   

DOI  :  10.1103/PhysRevB.85.075438

来源: SCIE

【 摘 要 】

Graphene-based nanostructures exhibit flat electronic energy bands in their single-particle spectrum. We consider interacting electrons in flat bands of zigzag nanoribbons. We present a protocol for flat-band projection that yields interaction-only tight-binding models. We argue that, at low densities, flat bands can delocalize single-particle basis states to support ferromagnetic quantum crystal ground states.

【 授权许可】

Free